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Mayfly Family Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs)

Taxonomic Navigation -?-
» Family Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs)
Genus in EphemerellidaeNumber of SpecimensNumber of Pictures
Attenella00
Caudatella00
Dannella00
DrunellaBlue-Winged Olives00
EphemerellaHendricksons, Sulphurs, PMDs037
EurylophellaChocolate Duns00
Matriella00
Penelomax00
Serratella00
TeloganopsisLittle black Quills00
Timpanoga00

3 genera aren't included.
Common Name


Pictures Below

This is page 23 of specimens of Ephemerellidae. Visit the main Ephemerellidae page for:

  • The behavior and habitat of Ephemerellidae.
  • 37 underwater pictures of Ephemerellidae.

Pictures of 271 Mayfly Specimens in the Family Ephemerellidae:

Specimen Page:1...222324...28
Male Serratella micheneri (Little Western Dark Hendrickson) Mayfly NymphMale Serratella micheneri (Little Western Dark Hendrickson) Mayfly Nymph View 9 PicturesThis specimen has tarsal claws (Tarsal claw: The claws at the tip of the tarsus, on an insect's "foot.") with 7 denticles (
The denticles on the tarsal claw of this Ephemerella nymph are highlighted in red.
The denticles on the tarsal claw of this Ephemerella nymph are highlighted in red.
Denticle: Small tooth-like projects, often appearing like serrations on the tarsal claws of certain mayfly nymphs.
)
and tubercles (
A few (not all) of the abdominal tubercles on this Ephemerella needhami nymph are circled.  They are especially large in this species.
A few (not all) of the abdominal tubercles on this Ephemerella needhami nymph are circled. They are especially large in this species.
Tubercle: Various peculiar little bumps or projections on an insect. Their character is important for the identification of many kinds of insects, such as the nymphs of Ephemerellidae mayflies.
)
on abdominal segments 4-7 only. It keys to Serratella micheneri, as do some other specimens from the same collection that lacked the dorsal (Dorsal: Top.) stripe.
Collected July 28, 2019 from Mystery Creek #199 in Washington
Added to Troutnut.com by Troutnut on July 30, 2019
Male Ephemerella excrucians (Pale Morning Dun) Mayfly NymphMale Ephemerella excrucians (Pale Morning Dun) Mayfly Nymph View 11 PicturesI used the ID of this nymph (and some others like it) to infer the identity of a female dun collected on the same trip.
Collected July 4, 2020 from Mystery Creek #249 in Washington
Added to Troutnut.com by Troutnut on July 12, 2020
Female Ephemerella invaria (Sulphur Dun) Mayfly SpinnerFemale Ephemerella invaria (Sulphur Dun) Mayfly Spinner View 4 PicturesHere's the first sulphur dun I found in the 2004 season.
Collected May 18, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Specimen Page:1...222324...28
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